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Anisocoria is a common condition, defined by a diameter difference of 0.4 mm or more between the sizes of the pupils of the eyes. [2] Anisocoria has various causes: [3] Physiological anisocoria: About 20% of the population has a slight
The main characteristic that distinguishes physiological anisocoria is an increase of pupil size with lower light or reduced illumination, such that the pupils differ in size between the two eyes. At any given eye examination, up to 41% of healthy patients can show an anisocoria of 0.4 mm or more at one time or another.
The ganglion cells give information about ambient light levels, and react sluggishly compared to the rods and cones. Signals from photosensitive ganglion cells have multiple functions including acute suppression of the hormone melatonin, entrainment of the body's circadian rhythms and regulation of the size of the pupil.
Mechanical anisocoria refers to anisocoria, a common eye condition in which the two pupils differ in size, that is the result of damage to the iris dilator muscle, which may be caused by trauma, angle-closure glaucoma, surgery such as cataract removal, or uveitis (inflammation of the eye).
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The American Journal of Critical Care revealed that critical care and neurosurgical nurses consistently underestimated pupil size, were unable to identify anisocoria, and incorrectly assessed pupil reactivity (sPLR). It concluded that automated pupillometry is a necessary tool for accuracy and consistency, and that it might facilitate earlier ...
“Many individuals don’t pour an actual serving size (5 ounces for wine, 12 ounces for beer, 1.5 ounces for spirits), so when we say ‘a drink’ for many individuals, it could be 1.5 or 2 ...
Gillnets are designed to catch fish of a certain size when the fish’s head passes through the net, but the body gets stuck. Theoretically, larger- and smaller-sized fish would either pass ...